126405891398 has 8 divisors (see below), whose sum is σ = 189612318000. Its totient is φ = 63201785400.

The previous prime is 126405891371. The next prime is 126405891419. The reversal of 126405891398 is 893198504621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436898 + ... + 666101.

It is an arithmetic number, because the mean of its divisors is an integer number (23701539750).

Almost surely, 2^126405891398 is an apocalyptic number.

126405891398 is a deficient number, since it is larger than the sum of its proper divisors (63206426602).

126405891398 is a wasteful number, since it uses less digits than its factorization.

126405891398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160302.

The product of its (nonzero) digits is 3732480, while the sum is 56.

The spelling of 126405891398 in words is "one hundred twenty-six billion, four hundred five million, eight hundred ninety-one thousand, three hundred ninety-eight".